<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<HTML>

<HEAD>

  <TITLE>LOVE YOU</TITLE>

  <META NAME="Generator" CONTENT="EditPlus">

  <META NAME="Author" CONTENT="">

  <META NAME="Keywords" CONTENT="">

  <META NAME="Description" CONTENT="">

  <LINK rel="icon"
    href="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fc.cidianwang.com%2Ffile%2Fshufa%2Fkaishu%2Ftianyingzhang%2F20166511139196.jpg&refer=http%3A%2F%2Fc.cidianwang.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1670478797&t=a303a0b1285dc94d1d44b66a39e75cc5" />

  <style>
    html,
    body {

      height: 100%;

      padding: 0;

      margin: 0;

      background: #000;

    }

    canvas {

      position: absolute;

      width: 100%;

      height: 100%;

    }
  </style>

</HEAD>

<BODY>

  </style>

  <canvas id="pinkboard"></canvas>

  <script>


    var settings = {

      particles: {

        length: 500,

        duration: 2,

        velocity: 100,

        effect: -0.75,

        size: 30,

      },

    };

    /*
    
    * 李佳怡我爱你！
    * 李佳怡我爱你！
    * 李佳怡我爱你！
    
    */

    (function () { var b = 0; var c = ["ms", "moz", "webkit", "o"]; for (var a = 0; a < c.length && !window.requestAnimationFrame; ++a) { window.requestAnimationFrame = window[c[a] + "RequestAnimationFrame"]; window.cancelAnimationFrame = window[c[a] + "CancelAnimationFrame"] || window[c[a] + "CancelRequestAnimationFrame"] } if (!window.requestAnimationFrame) { window.requestAnimationFrame = function (h, e) { var d = new Date().getTime(); var f = Math.max(0, 16 - (d - b)); var g = window.setTimeout(function () { h(d + f) }, f); b = d + f; return g } } if (!window.cancelAnimationFrame) { window.cancelAnimationFrame = function (d) { clearTimeout(d) } } }());


    var Point = (function () {

      function Point(x, y) {

        this.x = (typeof x !== 'undefined') ? x : 0;

        this.y = (typeof y !== 'undefined') ? y : 0;

      }

      Point.prototype.clone = function () {

        return new Point(this.x, this.y);

      };

      Point.prototype.length = function (length) {

        if (typeof length == 'undefined')

          return Math.sqrt(this.x * this.x + this.y * this.y);

        this.normalize();

        this.x *= length;

        this.y *= length;

        return this;

      };

      Point.prototype.normalize = function () {

        var length = this.length();

        this.x /= length;

        this.y /= length;

        return this;

      };

      return Point;

    })();


    var Particle = (function () {

      function Particle() {

        this.position = new Point();

        this.velocity = new Point();

        this.acceleration = new Point();

        this.age = 0;

      }

      Particle.prototype.initialize = function (x, y, dx, dy) {

        this.position.x = x;

        this.position.y = y;

        this.velocity.x = dx;

        this.velocity.y = dy;

        this.acceleration.x = dx * settings.particles.effect;

        this.acceleration.y = dy * settings.particles.effect;

        this.age = 0;

      };

      Particle.prototype.update = function (deltaTime) {

        this.position.x += this.velocity.x * deltaTime;

        this.position.y += this.velocity.y * deltaTime;

        this.velocity.x += this.acceleration.x * deltaTime;

        this.velocity.y += this.acceleration.y * deltaTime;

        this.age += deltaTime;

      };

      Particle.prototype.draw = function (context, image) {

        function ease(t) {

          return (--t) * t * t + 1;

        }

        var size = image.width * ease(this.age / settings.particles.duration);

        context.globalAlpha = 1 - this.age / settings.particles.duration;

        context.drawImage(image, this.position.x - size / 2, this.position.y - size / 2, size, size);

      };

      return Particle;

    })();




    var ParticlePool = (function () {

      var particles,

        firstActive = 0,

        firstFree = 0,

        duration = settings.particles.duration;

      function ParticlePool(length) {


        particles = new Array(length);

        for (var i = 0; i < particles.length; i++)

          particles[i] = new Particle();

      }

      ParticlePool.prototype.add = function (x, y, dx, dy) {

        particles[firstFree].initialize(x, y, dx, dy);


        firstFree++;

        if (firstFree == particles.length) firstFree = 0;

        if (firstActive == firstFree) firstActive++;

        if (firstActive == particles.length) firstActive = 0;

      };

      ParticlePool.prototype.update = function (deltaTime) {

        var i;


        if (firstActive < firstFree) {

          for (i = firstActive; i < firstFree; i++)

            particles[i].update(deltaTime);

        }

        if (firstFree < firstActive) {

          for (i = firstActive; i < particles.length; i++)

            particles[i].update(deltaTime);

          for (i = 0; i < firstFree; i++)

            particles[i].update(deltaTime);

        }

        while (particles[firstActive].age >= duration && firstActive != firstFree) {

          firstActive++;

          if (firstActive == particles.length) firstActive = 0;

        }

      };

      ParticlePool.prototype.draw = function (context, image) {


        if (firstActive < firstFree) {

          for (i = firstActive; i < firstFree; i++)

            particles[i].draw(context, image);

        }

        if (firstFree < firstActive) {

          for (i = firstActive; i < particles.length; i++)

            particles[i].draw(context, image);

          for (i = 0; i < firstFree; i++)

            particles[i].draw(context, image);

        }

      };

      return ParticlePool;

    })();


    (function (canvas) {

      var context = canvas.getContext('2d'),

        particles = new ParticlePool(settings.particles.length),

        particleRate = settings.particles.length / settings.particles.duration, // particles/sec

        time;


      function pointOnHeart(t) {

        return new Point(

          160 * Math.pow(Math.sin(t), 3),

          130 * Math.cos(t) - 50 * Math.cos(2 * t) - 20 * Math.cos(3 * t) - 10 * Math.cos(4 * t) + 25

        );

      }


      var image = (function () {

        var canvas = document.createElement('canvas'),

          context = canvas.getContext('2d');

        canvas.width = settings.particles.size;

        canvas.height = settings.particles.size;


        function to(t) {

          var point = pointOnHeart(t);

          point.x = settings.particles.size / 2 + point.x * settings.particles.size / 350;

          point.y = settings.particles.size / 2 - point.y * settings.particles.size / 350;

          return point;

        }


        context.beginPath();

        var t = -Math.PI;

        var point = to(t);

        context.moveTo(point.x, point.y);

        while (t < Math.PI) {

          t += 0.01;

          point = to(t);

          context.lineTo(point.x, point.y);

        }

        context.closePath();

        context.fillStyle = '#ea80b0';

        context.fill();

        var image = new Image();

        image.src = canvas.toDataURL();

        return image;

      })();


      function render() {

        requestAnimationFrame(render);


        var newTime = new Date().getTime() / 1000,

          deltaTime = newTime - (time || newTime);

        time = newTime;

        context.clearRect(0, 0, canvas.width, canvas.height);

        var amount = particleRate * deltaTime;

        for (var i = 0; i < amount; i++) {

          var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random());

          var dir = pos.clone().length(settings.particles.velocity);

          particles.add(canvas.width / 2 + pos.x, canvas.height / 2 - pos.y, dir.x, -dir.y);

        }

        particles.update(deltaTime);

        particles.draw(context, image);

      }

      function onResize() {

        canvas.width = canvas.clientWidth;

        canvas.height = canvas.clientHeight;

      }

      window.onresize = onResize;

      setTimeout(function () {

        onResize();

        render();

      }, 10);

    })(document.getElementById('pinkboard'));

  </script>

</BODY>

</HTML>